The propagation methods of Euphorbia milii
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Euphorbia milii is mainly propagated by cutting. First, cutting propagation: The cutting medium refers to the materials used for cutting, such as nutritious soil or river sand, peat soil, etc. It is difficult for home cuttings to get ideal cutting medium, so it is recommended to use a cutting medium that has been prepared and sterilized; medium-coarse river sand can also be used, but it should be washed several times with clean water before use. Do not use sea sand and river sand from saline-alkali areas, as they are not suitable for the growth of flowering plants. In early spring or late autumn (with the highest daytime temperature not exceeding 28℃ and the lowest night temperature not below 15℃), during the peak growing season, cut the leaves or stems (with 3-4 leaf nodes) and insert them into the medium after the wounds are dried. Slightly spray the cuttings and the medium, and as long as the medium is not too dry or waterlogged, roots and new buds will grow quickly. From late spring to early autumn when the temperature is higher, the cuttings are prone to rot, so it's better not to cut them.
Planting: When planting young seedlings, first put a 2-2 cm thick layer of coarse-grained medium or ceramsite at the bottom of the pot as a filter layer, then sprinkle a layer of fully decomposed organic fertilizer as a base fertilizer, about 1-2 cm thick, followed by a layer of medium, about 1-2 cm thick, then put the plant in, separating the fertilizer from the roots to avoid root burning.
The medium for planting can be chosen from the following options: Vegetable garden soil: furnace slag = 3:1; or garden soil: medium-coarse river sand: sawdust (sawdust) = 4:1:2; or one of the following: paddy soil, pond mud, decomposed leaf soil. Or peat + perlite + ceramsite = 2 parts + 2 parts + 1 part; vegetable garden soil + furnace slag = 3 parts + 1 part; peat + slag + ceramsite = 2 parts + 2 parts + 1 part; sawdust + vermiculite + medium-coarse river sand = 2 parts + 2 parts + 1 part. After planting, water thoroughly and keep it in a slightly shaded environment for a week.
II. Management
Humidity Management: It prefers a relatively dry air environment. If it rains continuously for too long, it is easily infected by pathogens. It is afraid of rain and should keep the leaves dry at night. The optimal relative humidity of the air is 40-60%.
Temperature Management: The optimal growing temperature is between 15℃ and 32℃. It is afraid of high temperature and humidity, and will enter a dormant state when the temperature exceeds 33℃ in the severe heat of summer. It dislikes cold frost and the overwintering temperature needs to be maintained above 10℃. When the temperature drops to below 4℃, it will also enter a dormant state. If the ambient temperature is close to 0℃, it will die from frostbite.
In summer:
1. Strengthen air circulation to allow the temperature inside it to dissipate;
2. Place it in a semi-shaded area, or provide 50% shading;
3. Spray it appropriately, 2-3 times a day.
In winter:
1. Move it to a bright place indoors for maintenance;
2. Outside, you can wrap it with plastic film to overwinter, but you need to uncover the film to let it breathe at noon every two days when the temperature is higher.
Light Management: In summer, when placed in a semi-shaded area or shaded by 50%, the leaf color will be more beautiful. In spring and autumn, when the temperature is not too high, it should be exposed to direct sunlight to facilitate photosynthesis and nutrient accumulation. In winter, keep it in a bright place indoors. Normally, keep it near the southeast-facing windows to receive light, and move it outdoors for maintenance every month or a month and a half, otherwise, the leaves will become thin and yellow, the new branches or petioles will be thin and the internodes will elongate, which will lead to a state of luxurious growth.
Fertilization and Watering Management: It has strong drought resistance and can grow even in dry conditions. However, this does not mean that it does not need to be watered or fertilized. Its roots are afraid of waterlogging. If the pot accumulates water or it is watered or fertilized too frequently, it can easily cause root rot. The principle of watering and fertilizing it is "wet and dry, dry thoroughly, not dry not water, water thoroughly", and avoid getting the plant wet when watering and fertilizing.
In spring and autumn, these two seasons are its peak growing seasons, and the management of fertilization and watering should follow the sequence of "flower treasure" - water - "flower treasure" - water - water, with an interval cycle of about 2-4 days for outdoor maintenance (shorter during sunny or high-temperature periods, longer during rainy or low-temperature periods, or not watered), and 3-6 days for indoor maintenance (shorter during sunny or high-temperature periods, longer during rainy or low-temperature periods, or not watered).
In summer, it often enters a dormant state during the high-temperature period and requires less fertilization and watering, or even controlled fertilization and watering. The management of fertilization and watering should follow the sequence of "flower treasure" - water - water - "flower treasure" - water - water - water, with an interval cycle of about 3-5 days for outdoor maintenance (shorter during sunny or high-temperature periods, longer during rainy or low-temperature periods, or not watered), and 4-7 days for indoor maintenance (shorter during sunny or high-temperature periods, longer during rainy or low-temperature periods, or not watered). Try to arrange watering time during the early morning or evening when the temperature is lower. Also, spray the plant regularly.
In winter, during the dormant period, mainly focus on controlling fertilization and watering. The management of fertilization and watering should follow the sequence of "flower treasure" - water - water - "flower treasure" - water - water - water, with an interval cycle of about 7-10 days (shorter during sunny or high-temperature periods, longer during rainy or low-temperature periods, or not watered). Watering time should be arranged during the middle of the day when the temperature is higher on sunny days.
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